Analysis and Modeling of Surface Acoustic Wave Chemical Vapor Sensors

Hribsek, M.; Tošić, Dejan V.

doi:10.5772/9692

Cited by 5 publications

(11 citation statements)

References 45 publications

(71 reference statements)

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“…Using SAW sensors, it is possible to measure the mass change of even several nanograms [19]. The measured frequency shift of sensors is proportional to the mass of particles deposited on the sensing layer and can be practically expressed by equation [20]:…”

Section: Saw Sensor 21 Principle Of Operationmentioning

confidence: 99%

Technical aspects of SAW gas sensors application in environmental measurements

Guz

2019

MATEC Web Conf.

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The development of semiconductor technology and computer methods allows for the improvements in air pollutions measurement techniques. Besides the traditional techniques of air pollution measurement such as chromatography or dynamic olfactometry, the electronic nose (EN) gains increasing attention in this area. EN is a device which imitates the human olfactory sense. The main component of the device is an array of many nonspecific gas sensors. In this article, the most frequently used types of gas sensors in scientific studies were shortly characterised as: metal oxide semiconductors (MOS), conducting polymers, quartz microbalances (QCM) and surface acoustic wave (SAW) sensors, and others. Both their advantages and disadvantages were summarised. Technical aspects of measurements using SAW gas sensors arrays were presented, as well as measurement circuits were described.

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Section: Saw Sensor 21 Principle Of Operationmentioning

confidence: 99%

Technical aspects of SAW gas sensors application in environmental measurements

Guz

2019

MATEC Web Conf.

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“…Na slici 10 je šematski prikazano ekvivalentno električno kolo senzora namenjenog detekciji gasova koji simuliraju bojne otrove [22][23][24][25][26][27][28][29]. Razlika između ovog napona i izlaznog napona koji se dobija u prisustvu gasa biće proporcionalna koncentraciji gasa u okruženju (vazduhu).…”

Section: Pat Senzori Bojnih Otrovaunclassified

“…Podaci koji su korišćeni u izračunavanjima su: Za koncentraciju od 5 ppm DCM-a izmerena vrednost pomeraja učestanosti je 574 Hz [30]. Za istu koncentraciju istog gasa na polimeru PIB nije bilo moguće izmeriti odgovarajući pomeraj [29]. To se može objasniti činjenicom što je konstanta K u ovom slučaju oko tri puta manja, pa je prema tome i detektovani signal tri puta manji, što je verovatno ispod granice osetljivosti analizatora.…”

Section: Pat Senzori Bojnih Otrovaunclassified

“…Na bazi razvijene metode modeliranja napravljeni su i konkretni proračuni za gasove za koje postoje eksperimentalni podaci u literaturi [29,30]. Za sloj polianilin/In2O 3 debljine 0,4•10 -6 m na LiNbO 3 kod PAT senzora učestanosti 107,2•10 6 Hz, promena učestanosti izazvana koncentracijom CO od 500 ppm, izračunata korišćenjem jed. (1), iznosi 2,016 Numeričke vrednosti dobijene na osnovu prikazanog modela PAT senzora veoma se malo razlikuju od eksperimentalnih rezultata, jer model daje relativno uprošćenu sliku PAT senzora i ne uzima u obzir slučajne uticaje i greške tokom izrade senzora i tokom merenja.…”

Section: Pat Senzori Bojnih Otrovaunclassified

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Modeling and design of surface acoustic wave filters and their military applications

Hribsek¹,

Ristić²,

Radojković³

et al. 2011

Vojnotehnički glasnik

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U radu su dati osnovni principi rada PAT filtara, materijali i tehnologije primenjeni u njihovoj proizvodnji. Posebna pažnja posvećena je širokoj i raznovrsnoj primeni filtara s površinskim akustičkim talasom u procesiranju signala, telekomunikacijama i u oblasti hemijskih senzora, sa naglaskom na primene u vojne svrhe. Prikazan je originalni metod koji su autori razvili za modeliranje i predikciju karakteristika PAT filtara. Mogućnosti ovog metoda su ilustrovane na primeru hemijskih senzora za detekciju bojnih otrova. Projektovan je i izrađen PAT filtar PAT-FPO, koji je osnova za hemijski senzor specijalne namene.

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“…Specifically several water vapor / PVA experiments were conducted as PVA is known to absorb water vapor and has been used extensively in water and vapor sensing [47][32], [48], [49]. In addition, PVA swelling mechanism and corresponding changes of volume and density as functions of relative humidity are well studied [50][51] [52].…”

Section: Diffusion and Fick's Lawmentioning

confidence: 99%

Humidity Sensor Based on Mems Saw Technology

ESCOBAR¹

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Analysis and Modeling of Surface Acoustic Wave Chemical Vapor Sensors

Cited by 5 publications

References 45 publications

Technical aspects of SAW gas sensors application in environmental measurements

Technical aspects of SAW gas sensors application in environmental measurements

Modeling and design of surface acoustic wave filters and their military applications

Humidity Sensor Based on Mems Saw Technology

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